CONCHOLOGY. 



be thus described. Shell tapering; whorls 

 about six ; suture not deeply impressed ; 

 aperture hardly equal to half the length 

 of the shell, but little dilated; within 

 brownish, particularly upon the column, 

 which is contracted in the middle ; outer 

 lip white, and almost imperceptibly re- 

 pand within; umbilicus very distinct. 

 Length one inch. 



A specimen was also brought from 

 the West Indies by Mr. L'Hermenier of 

 Charleston. 



2. L. Heteroslropha. Shell sinistral, sub- 

 ovated; colour, pale yellow, chesnut or 

 blackish ; whorls four, the first large, the 

 others very small, terminating rather ab- 

 ruptly in an acute apex ; aperture large, 

 somewhat oval, three-fourths of the 

 length of the shell, or rather more; 

 within of a pearly lustre, often blackish ; 

 lip a little thickened on the inside, and 

 tinged with dull red. 



Inhabits with the first species, and al- 

 most as numerous. 



Plate 1. fig. 6. 



Animal resembles that of L. Catasco- 

 pium, but is of a darker colour and longer 

 than its shell, the tentacula also are long- 

 er, and setaceous ; tail acute. 



The mantle is trifid at the base of the 

 pillar lip, and at the upper corner of the 

 aperture ; deposits eggs the beginning of 

 May; eggs enveloped by a transparent 

 gelatinous substance; the nucleus, after 

 a few days, appears of a pale or milk 

 white colour, and not so well defined as 

 those of L. catascopium. 



3. L. columella. Shell thin, fragile, 

 horn-colour ; whorls four, longitudinally 

 wrinkled. Spire prominent, acute* Su- 

 ture not much impressed. Aperture di- 

 lated, ovate. Columella much narrowed 

 near the base, so that the view may be 

 extended from the base almost to the in- 

 terior apex of the shell. Length seven- 

 tenths of an inch nearly ; of the spire one- 

 quarter of an inch. 



Inhabits stagnant waters and miry 

 places. 



Journ. Acad. Nat. Sciences, vol i. p. 14. 



Animal aquatic, base not so long as the 

 aperture ; dusky, with small whitish spots; 

 tentacula broad, pyramidal, compressed ; 

 eyes small, black, placed at the inner base 

 of the tentacula. 



This species is allied to L. Catascopium 

 but the revolution of the whorls is more 

 oblique, the shell thinner, the aperture 

 much more dilated, and the columella dif- 

 ferently formed. For several specimens 



of this shell,- we are indebted to Mr. Titian 

 Peale. 



GENUS SUCCINEA. DRAP. 



Shell oval or oblong; aperture large, 

 oblique ; columella narrowed. 



Animal terrestrial, larger than its shell ; 

 tentacula four, inferior pair smaller ; eyes 

 placed at the tip of the superior tentacu- 

 la; operculum none. 



SPECIES. 



1. S. Campestris. Shell oval, very fragile; 

 whorls three, not remarkably oblique, 

 pale yellowish, with opaque white, and 

 vitreous lines, irregularly alternating. 



Length not quite three-fifths ; breadth 

 seven-twentieths of an inch. 



Journ. Jlcad. Nat. Sciences, vol. i. p. 281. 



This shell is extremely common in ma- 

 ny parts of the southern states; it abounds 

 in the sea-islands of Georgia, in the low 

 marshy grounds behind the sand hills of 

 the coast, where they are destroyed in 

 great numbers by the annual conflagra- 

 tion of the old grass ; on Amelia island, 

 East Florida, I found them in plenty on 

 the highest sandy ground of the island, 

 On Cumberland Island, in Mr. James 

 Shaw's garden, I obtained several speci- 

 mens from the leaves of radishes. 



The resemblance between this specie 3 

 and the ovalis is very great; it differs* 

 however, in being less elongated, and of 

 a more robust form ; the revolution of the 

 spire is much less oblique, the shell itself 

 is thicker and less fragile. 



Animal whitish; eyes, inferior tentacu- 

 la, and a line passing from the eyes, dis- 

 appearing under the shell, black ; a gam- 

 boge coloured vitta is visible through that 

 part of the shell which is opposed to the 

 mouth. 



2. S. Ovalis. Shell suboval, pale yel- 

 lowish, diaphanous, very thin and fragile, 

 with nearly three oblique volutions. Bo- 

 dy very large. Spire small, but little 

 prominent, somewhat obtuse. Aperture 

 longitudinally subovate, large. ColumeU 

 la much narrowed, so as almost to permit 

 the view of the interior apex from the 

 base of the shell. Scarcely any calcare- 

 ous deposit on the pillar Up. Length 

 nine-twentieths of an inch, aperture se- 

 ven-twentieths. 



Inhabits marshy grounds in shaded si- 

 tuations. Common. 



Journ. Jlcad. J\at, Sciences* vol. i. p. 15, 



